公开(公告)号：US3558567A

公开(公告)日：1971-01-26

申请号：US3558567D

申请日：1967-12-28

Applicant: ALLIED CHEM

Inventor： TWILLEY IAN C ,  ROTH DAVID W H JR ,  LOFQUIST ROBERT A

IPC: C08G69/16 ,  C08G20/00

CPC classification number: C08G69/16

Abstract: NYLON-6 HAVING A LOW CYCLIC OLIGOMER CONTENT IS PRODUCED BY HEATING A MIXTURE OF EPSILON-CAPROLACTAM AND WATER (TOGETHER WITH PROPERTY-MODIFYING ADDITIVES AND CHAIN-TERMINATING AGENTS, IF DESIRED) TO EFFECT REACTION OF EPSILON-CAPROLACTAM AT A RATE DETERMINED BY THE MAXIMUM CONCENTRATION OF CYCLIC OLIGMERS DESIRED IN THE PRODUCT, A SLOWER RATE RESULTING IN A LOWER CYCLIC OLIGOMER CONTENT. WHEN LESS THAN ABOUT 45% OF THE EPSILON-CAPROLACTAM IS REACTED AND THE MIXTURE HAS GONE THROUGH A MAXIMUM END GROUP CONCENTRATION, THE RATE OF POLYMERIZATION CAN BE INCREASED AND EVAPORATIVE CONDITIONS CAN BE APPLIED TO REMOVE WATER AND EXCESS MONOMER WITHOUT F URTHER INCREASING THE CONCENTRATION OF CYCLIC OLIGOMERS.

公开(公告)号：US3549594A

公开(公告)日：1970-12-22

申请号：US3549594D

申请日：1969-10-01

Applicant: ALLIED CHEM

Inventor： TWILLEY IAN C ,  LAZARUS STANLEY D

IPC: C08G73/20 ,  C08G20/32 ,  C08G33/02

CPC classification number: C08G73/20

公开(公告)号：US3386964A

公开(公告)日：1968-06-04

申请号：US33194063

申请日：1963-12-19

Applicant: ALLIED CHEM

Inventor： TWILLEY IAN C

IPC: C08G69/36

CPC classification number: C08G69/36

公开(公告)号：US3280053A

公开(公告)日：1966-10-18

申请号：US28855263

申请日：1963-06-17

Applicant: ALLIED CHEM

Inventor： TWILLEY IAN C ,  POZNICK FREDERICK P

IPC: C08K3/00 ,  C08K5/098 ,  C08L77/00

CPC classification number: C08K5/098 ,  C08K3/10 ,  C08L77/00 ,  C08L77/02

Abstract: 1,050,001. Heat - stabilized polyamides. ALLIED CHEMICAL CORPORATION. June 16, 1964 [June 17, 1963], No. 24951/64. Heading C3R. Polyamides are heat-stabilized by the incorporation of copper or a copper compound and a stannous salt. Specified polyamides are polycaproamide, polyundecanoamide, polyhexamethylene adipamide and sebacamide and polym- and p-xylylene apdiamides. In the examples various copper and stannous salts are incorporated in caprolactam during its polymerization.

公开(公告)号：US3279974A

公开(公告)日：1966-10-18

申请号：US27182763

申请日：1963-02-01

Applicant: ALLIED CHEM

Inventor： TWILLEY IAN C ,  MATSON MALCOLM E

IPC: D01F1/04 ,  D01F1/10 ,  D01F6/60

CPC classification number: D01F1/04 ,  D01F6/60 ,  D01F6/62